If you actually used the bank to do the transaction, and you still don't have it after, say, 48 hours, make a thread in the Contact NP Staff subforum.
I had an experience previously where I sold my NP$ to the bank (because I needed money in PayPal ASAP and bank transfer was like 3 days wait), and I never received the money. I posted in the contact staff forum and -RJ- was kind enough to tell me that the system was actually broken (since people VERY RARELY use it, most people just do member to member transactions) and he had fixed it. He also was very generous and gave me a higher rate exchange rate. =D
Namepros wins.